BenQ W700 User Manual page 36

4:3: 
3.
Scales an image so that it is displayed in
the center of the screen with a 4:3 aspect
ratio. This is most suitable for 4:3
images like computer monitors,
standard definition TV and 4:3 images
aspect DVD movies, as it displays them
without aspect alteration.
16:9: 
4.
Scales an image so that it is displayed in
the center of the screen with a 16:9
aspect ratio. This is most suitable for
images which are already in a 16:9
aspect, like high definition TV, as it
displays them without aspect alteration.
5. 16:10:
Scales an image so that it is displayed in
the center of the screen with a 16:10
aspect ratio. This setting stretches and
resizes linearly.
36 Operation
4:3 picture
16:9 picture